twitter-bootstrap - 两行的 Bootstrap 导航栏

Question

我想要一个具有两行导航元素的 Bootstrap 3 导航栏，并且导航栏品牌跨越两行。在 SM+ 屏幕尺寸上，两行都是可见的。在 XS 屏幕尺寸上，第二行折叠并显示要打开的图标栏。

SM+

+-------------------------------------------------------------------------------+
|               |                                             Nav-A-1  Nav-A-2  |
|  SITE LOGO    |---------------------------------------------------------------+
|               |  Nav-B-1  Nav-B-2 Nav-B-3 Nav-B-4                 Form-Right  |
+-------------------------------------------------------------------------------+

小号

+-------------------------------------------------------------------------------+
|               |                                             Nav-A-1  Nav-A-2  |
|  SITE LOGO    |---------------------------------------------------------------+
|               |  Nav-Collapsed                                     Hamburger  |
+-------------------------------------------------------------------------------+

导航栏怎么能做到这一点？

Answer 1

您基本上可以使用两个导航栏，然后使用 position: absolute为您的形象。您可能会使用网格，但您的折叠菜单很可能不会在移动设备上全角显示。

工作示例:

.navbar-inverse.nav-upper {
  height: 50px;
}
.navbar-inverse.nav-upper ul {
  float: right;
  display: table;
}
.navbar-inverse.nav-upper .navbar-upper > li {
  display: table-cell;
  font-size: 14px;
}
.navbar-inverse.nav-upper .navbar-upper > li > a {
  color: #777;
}
@media (min-width: 768px) {
  .navbar.navbar-lower .navbar-nav {
    margin-left: 100px;
  }
}
.navbar-logo {
  background-image: url('https://lh3.googleusercontent.com/-tw5LsU4Fg28/Umo6BBcoCnI/AAAAAAAAmjE/1iqULsem06E/w896-h896/heisencat.png');
  width: 90px;
  height: 90px;
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  position: absolute;
  top: 5px;
  left: 15px;
  z-index: 1051;
}

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<a class="navbar-logo" href="#"></a>

<nav class="navbar-inverse nav-upper">
  <div class="container-fluid">
    <ul class="nav navbar-upper">
      <li><a href="#">NAV-A-1</a>
      </li>
      <li><a href="#">NAV-A-2</a>
      </li>
    </ul>
  </div>
</nav>

<nav class="navbar navbar-inverse navbar-static-top navbar-lower">
  <div class="container-fluid">

    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false"> <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
    </div>

    <div class="collapse navbar-collapse" id="navbar">
      <ul class="nav navbar-nav">
        <li><a href="#">NAV-B-1</a>
        </li>
        <li><a href="#">NAV-B-2</a>
        </li>
        <li><a href="#">NAV-B-3</a>
        </li>
        <li><a href="#">NAV-B-4</a>
        </li>
      </ul>
      <form class="navbar-form navbar-right" role="search">
        <div class="form-group">
          <div class="input-group">
            <input type="text" class="form-control" placeholder="Search">
            <span class="input-group-btn">
              <button type="submit" class="btn btn-default">Submit</button>
            </span>
          </div>
        </div>
      </form>
    </div>
  </div>
</nav>